46. An interesting question, but how useful are even real answers?

White, male, middle class, what have you. Even if all spree killers were members of these groups and no others (not all are of course) they would still be a vanishingly small portion of them. What can be done to isolate which tiny percentage of those millions who share those traits are at risk of becoming a timebomb? We surely cannot/should not psychologically evaluate every 20-something white male, and psychanalysis has a terrible success level with individualized predictions anyway. Ban them from owning guns? Impossible and irrational constiturionally and legally. Ban everyone from owning guns? Closest comparison there would be Australia, which saw no better movement on homicide and violent crime than we did in the same timeframe (the UK was effectively almost completely disarmed generations ago - Dunblane just closed some small loopholes, and the same is true for them anyway). Video games? Never shown up in the data - as objectively absurd as school prayer as a causal factor.

So until we can get better at individual behavior prediction, I'm not sure listing common factors would be all that useful.